Effective date: 22 July 2026
Last updated: 30 July 2026

Yisi provides digital learning services. This information should be read together with our Terms of Service and Privacy Policy.

1. Free service

All currently available Yisi features and learning content are provided free of charge. No fee is required to create an account or access the content currently available in the app.

2. No billing information

Yisi does not collect billing information for its currently available services. Access to available learning content is not based on a payment made inside or outside the app.

3. Service issues

If you cannot access an available feature or encounter a service error, contact us using the details below. We may ask for your account details, device information, and a description of the issue so that we can investigate.

4. Contact us

Yisi AI Education (HK) Technology Limited
CR No. 80694099
RM 801, 8/F, THE CLOUD, 111 TUNG CHAU STREET, Tai Kok Tsui, Hong Kong
Telephone: +86 186 1298 8016